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A tower leans towards west making an angle alpha with the vertical. The angular elevation of B, the top most point of the tower is beta as observed from a point C due east of A at distance d from A. If the angular elevation of B from a point due east of C a distance 2d from C isgamma , " then " 2tan alpha can be written as |
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Answer» `3cotbeta-2cot GAMMA` |
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